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<FONT color="green">001</FONT>    package com.nokia.midp.example.jsr234.audio3d;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.io.InputStream;<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    import javax.microedition.amms.GlobalManager;<a name="line.5"></a>
<FONT color="green">006</FONT>    import javax.microedition.amms.SoundSource3D;<a name="line.6"></a>
<FONT color="green">007</FONT>    import javax.microedition.amms.Spectator;<a name="line.7"></a>
<FONT color="green">008</FONT>    import javax.microedition.amms.control.audio3d.DistanceAttenuationControl;<a name="line.8"></a>
<FONT color="green">009</FONT>    import javax.microedition.amms.control.audio3d.LocationControl;<a name="line.9"></a>
<FONT color="green">010</FONT>    import javax.microedition.lcdui.Command;<a name="line.10"></a>
<FONT color="green">011</FONT>    import javax.microedition.lcdui.CommandListener;<a name="line.11"></a>
<FONT color="green">012</FONT>    import javax.microedition.lcdui.Display;<a name="line.12"></a>
<FONT color="green">013</FONT>    import javax.microedition.lcdui.Displayable;<a name="line.13"></a>
<FONT color="green">014</FONT>    import javax.microedition.lcdui.Form;<a name="line.14"></a>
<FONT color="green">015</FONT>    import javax.microedition.media.Manager;<a name="line.15"></a>
<FONT color="green">016</FONT>    import javax.microedition.media.MediaException;<a name="line.16"></a>
<FONT color="green">017</FONT>    import javax.microedition.media.Player;<a name="line.17"></a>
<FONT color="green">018</FONT>    import javax.microedition.midlet.MIDlet;<a name="line.18"></a>
<FONT color="green">019</FONT>    import javax.microedition.midlet.MIDletStateChangeException;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    /**<a name="line.21"></a>
<FONT color="green">022</FONT>     * MIDlet class is responsible to handle Audio 3D effect with respect to the Sound Source and<a name="line.22"></a>
<FONT color="green">023</FONT>     * Observer. It initializes the Audio 3D sound source and spectator. <a name="line.23"></a>
<FONT color="green">024</FONT>     * &lt;br&gt;Example gives following aspects:<a name="line.24"></a>
<FONT color="green">025</FONT>     * &lt;br&gt;&lt;br&gt;<a name="line.25"></a>
<FONT color="green">026</FONT>     * <a name="line.26"></a>
<FONT color="green">027</FONT>     * &lt;ol&gt;<a name="line.27"></a>
<FONT color="green">028</FONT>     * 1. LocationControl: It controls the virtual location of an object in the virtual sound space.&lt;br&gt;<a name="line.28"></a>
<FONT color="green">029</FONT>     * 2. DistanceAttenuationControl: It controlls the sound from a sound source is attenuated with its distance from the Observer.&lt;br&gt;<a name="line.29"></a>
<FONT color="green">030</FONT>     * &lt;/ol&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     * &lt;br&gt;<a name="line.31"></a>
<FONT color="green">032</FONT>     * Class performs following functionalities:&lt;br&gt;<a name="line.32"></a>
<FONT color="green">033</FONT>     * - Initializing Canvas and other required controls&lt;br&gt;<a name="line.33"></a>
<FONT color="green">034</FONT>     * - Initialize Sound Source&lt;br&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     * - initialize spectator&lt;br&gt;<a name="line.35"></a>
<FONT color="green">036</FONT>     * - Create Player to play Audio3D&lt;br&gt;<a name="line.36"></a>
<FONT color="green">037</FONT>     * &lt;br&gt;<a name="line.37"></a>
<FONT color="green">038</FONT>     * <a name="line.38"></a>
<FONT color="green">039</FONT>     * &lt;b&gt; Pre-requisites&lt;/b&gt;&lt;br&gt;<a name="line.39"></a>
<FONT color="green">040</FONT>     * - Enable the sound to feel the sound effect<a name="line.40"></a>
<FONT color="green">041</FONT>     * <a name="line.41"></a>
<FONT color="green">042</FONT>     * &lt;b&gt;Note: &lt;/b&gt; This Example application is only reference implementation for JSR 234 - Advanced Multimedia Supplements.<a name="line.42"></a>
<FONT color="green">043</FONT>     * Go through the JSR234 Specification to get more idea about Advanced Multimedia Supplements APIs<a name="line.43"></a>
<FONT color="green">044</FONT>     * @author gothadiy<a name="line.44"></a>
<FONT color="green">045</FONT>     *<a name="line.45"></a>
<FONT color="green">046</FONT>     */<a name="line.46"></a>
<FONT color="green">047</FONT>    public class Audio3DMIDlet extends MIDlet implements CommandListener {<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>            /**Title of midlet start form*/<a name="line.49"></a>
<FONT color="green">050</FONT>            private static final String START_FORM_TITLE = "AMMS Audio 3D";<a name="line.50"></a>
<FONT color="green">051</FONT>    <a name="line.51"></a>
<FONT color="green">052</FONT>            /**Message to display on start midlet form*/<a name="line.52"></a>
<FONT color="green">053</FONT>            private static final String START_MESSAGE = "Please hit Start to observer Audio 3D effect!!";<a name="line.53"></a>
<FONT color="green">054</FONT>    <a name="line.54"></a>
<FONT color="green">055</FONT>            /**Audio wav content type*/<a name="line.55"></a>
<FONT color="green">056</FONT>            private static final String CONTENT_TYPE = "audio/x-wav";<a name="line.56"></a>
<FONT color="green">057</FONT>    <a name="line.57"></a>
<FONT color="green">058</FONT>            /**Distance Attenuation control property*/<a name="line.58"></a>
<FONT color="green">059</FONT>            private static final String DISTANCE_ATTENUATION_CONTROL = "javax.microedition.amms.control.audio3d.DistanceAttenuationControl";<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>            /**Location Control property*/<a name="line.61"></a>
<FONT color="green">062</FONT>            private static final String LOCATION_CONTROL = "javax.microedition.amms.control.audio3d.LocationControl";<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>            /**Audio Sound source file path*/<a name="line.64"></a>
<FONT color="green">065</FONT>            private static final String AUDIO3D_SOUND = "/com/nokia/midp/example/jsr234/audio3d/res/music2.wav";<a name="line.65"></a>
<FONT color="green">066</FONT>    <a name="line.66"></a>
<FONT color="green">067</FONT>            /**Constant to set the UI move per screen*/<a name="line.67"></a>
<FONT color="green">068</FONT>            public static final int MOVE_PER_SCREEN = 5;<a name="line.68"></a>
<FONT color="green">069</FONT>    <a name="line.69"></a>
<FONT color="green">070</FONT>            /**Max X and Y values*/<a name="line.70"></a>
<FONT color="green">071</FONT>            public static final int MAX_VALUES = MOVE_PER_SCREEN * 5;<a name="line.71"></a>
<FONT color="green">072</FONT>    <a name="line.72"></a>
<FONT color="green">073</FONT>            /**Display instance*/<a name="line.73"></a>
<FONT color="green">074</FONT>            Display display;<a name="line.74"></a>
<FONT color="green">075</FONT>    <a name="line.75"></a>
<FONT color="green">076</FONT>            /**Start command to start the Audio3D stuff*/<a name="line.76"></a>
<FONT color="green">077</FONT>            Command startCommand = new Command("Start", Command.OK, 1);<a name="line.77"></a>
<FONT color="green">078</FONT>    <a name="line.78"></a>
<FONT color="green">079</FONT>            /**Exit command to exit from the application*/<a name="line.79"></a>
<FONT color="green">080</FONT>            Command exitCommand = new Command("Exit", Command.EXIT, 2);<a name="line.80"></a>
<FONT color="green">081</FONT>    <a name="line.81"></a>
<FONT color="green">082</FONT>            /**Location Settings command*/<a name="line.82"></a>
<FONT color="green">083</FONT>            Command locationCommand = new Command("Location Settings", Command.SCREEN,<a name="line.83"></a>
<FONT color="green">084</FONT>                            3);<a name="line.84"></a>
<FONT color="green">085</FONT>            <a name="line.85"></a>
<FONT color="green">086</FONT>            Command distAttenuationCommand = new Command("Distance Attenuation Settings",Command.SCREEN,4);<a name="line.86"></a>
<FONT color="green">087</FONT>    <a name="line.87"></a>
<FONT color="green">088</FONT>            /** Source location control */<a name="line.88"></a>
<FONT color="green">089</FONT>            LocationControl sourceLC;<a name="line.89"></a>
<FONT color="green">090</FONT>    <a name="line.90"></a>
<FONT color="green">091</FONT>            /** Spectator location control */<a name="line.91"></a>
<FONT color="green">092</FONT>            LocationControl specLC;<a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>            /**Distance Attenuation Control*/<a name="line.94"></a>
<FONT color="green">095</FONT>            DistanceAttenuationControl ctlDistAtt;<a name="line.95"></a>
<FONT color="green">096</FONT>    <a name="line.96"></a>
<FONT color="green">097</FONT>            /**Player for sound source*/<a name="line.97"></a>
<FONT color="green">098</FONT>            Player player;<a name="line.98"></a>
<FONT color="green">099</FONT>    <a name="line.99"></a>
<FONT color="green">100</FONT>            /**Instance of sound source 3D*/<a name="line.100"></a>
<FONT color="green">101</FONT>            SoundSource3D sound3D;<a name="line.101"></a>
<FONT color="green">102</FONT>    <a name="line.102"></a>
<FONT color="green">103</FONT>            /**Instance of InputStream*/<a name="line.103"></a>
<FONT color="green">104</FONT>            InputStream inStream;<a name="line.104"></a>
<FONT color="green">105</FONT>    <a name="line.105"></a>
<FONT color="green">106</FONT>            /**UI canvas*/<a name="line.106"></a>
<FONT color="green">107</FONT>            Audio3DCanvas audio3DCanvas;<a name="line.107"></a>
<FONT color="green">108</FONT>    <a name="line.108"></a>
<FONT color="green">109</FONT>            /**Location Attributes*/<a name="line.109"></a>
<FONT color="green">110</FONT>            LocationAttributes locAttr;<a name="line.110"></a>
<FONT color="green">111</FONT>    <a name="line.111"></a>
<FONT color="green">112</FONT>            DistAttenuationAttributes distAttnAttr;<a name="line.112"></a>
<FONT color="green">113</FONT>            <a name="line.113"></a>
<FONT color="green">114</FONT>            /**Instance of form to display start form*/<a name="line.114"></a>
<FONT color="green">115</FONT>            Form startForm;<a name="line.115"></a>
<FONT color="green">116</FONT>    <a name="line.116"></a>
<FONT color="green">117</FONT>            /**Instance of location settings form*/<a name="line.117"></a>
<FONT color="green">118</FONT>            LocationForm locationForm = null;<a name="line.118"></a>
<FONT color="green">119</FONT>    <a name="line.119"></a>
<FONT color="green">120</FONT>            DistAttenuationForm distAttForm = null;<a name="line.120"></a>
<FONT color="green">121</FONT>            <a name="line.121"></a>
<FONT color="green">122</FONT>            /**MIDlet constructor*/<a name="line.122"></a>
<FONT color="green">123</FONT>            public Audio3DMIDlet() {<a name="line.123"></a>
<FONT color="green">124</FONT>                    display = Display.getDisplay(this);<a name="line.124"></a>
<FONT color="green">125</FONT>            }<a name="line.125"></a>
<FONT color="green">126</FONT>    <a name="line.126"></a>
<FONT color="green">127</FONT>            /**Audio 3D MIDlet start form*/<a name="line.127"></a>
<FONT color="green">128</FONT>            private void startAudio3DForm() {<a name="line.128"></a>
<FONT color="green">129</FONT>                    startForm = new Form(START_FORM_TITLE);<a name="line.129"></a>
<FONT color="green">130</FONT>                    startForm.append(START_MESSAGE);<a name="line.130"></a>
<FONT color="green">131</FONT>                    startForm.addCommand(startCommand);<a name="line.131"></a>
<FONT color="green">132</FONT>                    startForm.addCommand(exitCommand);<a name="line.132"></a>
<FONT color="green">133</FONT>                    startForm.setCommandListener(this);<a name="line.133"></a>
<FONT color="green">134</FONT>                    display.setCurrent(startForm);<a name="line.134"></a>
<FONT color="green">135</FONT>            }<a name="line.135"></a>
<FONT color="green">136</FONT>    <a name="line.136"></a>
<FONT color="green">137</FONT>            /**It initializes all controls and UI components.*/<a name="line.137"></a>
<FONT color="green">138</FONT>            void init() {<a name="line.138"></a>
<FONT color="green">139</FONT>    <a name="line.139"></a>
<FONT color="green">140</FONT>                    audio3DCanvas = new Audio3DCanvas(MAX_VALUES, this);<a name="line.140"></a>
<FONT color="green">141</FONT>                    audio3DCanvas.addCommand(locationCommand);<a name="line.141"></a>
<FONT color="green">142</FONT>                    audio3DCanvas.addCommand(distAttenuationCommand);<a name="line.142"></a>
<FONT color="green">143</FONT>                    audio3DCanvas.addCommand(exitCommand);<a name="line.143"></a>
<FONT color="green">144</FONT>                    audio3DCanvas.setCommandListener(this);<a name="line.144"></a>
<FONT color="green">145</FONT>                    display.setCurrent(audio3DCanvas);<a name="line.145"></a>
<FONT color="green">146</FONT>    <a name="line.146"></a>
<FONT color="green">147</FONT>                    locAttr = new LocationAttributes(1200, 1000);<a name="line.147"></a>
<FONT color="green">148</FONT>                    distAttnAttr = new DistAttenuationAttributes(1000,1000,0,false);<a name="line.148"></a>
<FONT color="green">149</FONT>                    <a name="line.149"></a>
<FONT color="green">150</FONT>                    initControls();<a name="line.150"></a>
<FONT color="green">151</FONT>    <a name="line.151"></a>
<FONT color="green">152</FONT>            }<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>            /**Displays application startup form*/<a name="line.154"></a>
<FONT color="green">155</FONT>            public void startApp() throws MIDletStateChangeException {<a name="line.155"></a>
<FONT color="green">156</FONT>                    startAudio3DForm();<a name="line.156"></a>
<FONT color="green">157</FONT>            }<a name="line.157"></a>
<FONT color="green">158</FONT>    <a name="line.158"></a>
<FONT color="green">159</FONT>            public void pauseApp() {<a name="line.159"></a>
<FONT color="green">160</FONT>            }<a name="line.160"></a>
<FONT color="green">161</FONT>    <a name="line.161"></a>
<FONT color="green">162</FONT>            /**Stop the player*/<a name="line.162"></a>
<FONT color="green">163</FONT>            public void destroyApp(boolean unconditional) {<a name="line.163"></a>
<FONT color="green">164</FONT>                    try {<a name="line.164"></a>
<FONT color="green">165</FONT>                            player.stop();<a name="line.165"></a>
<FONT color="green">166</FONT>                            player = null;<a name="line.166"></a>
<FONT color="green">167</FONT>                            sound3D = null;<a name="line.167"></a>
<FONT color="green">168</FONT>                    } catch (MediaException e) {<a name="line.168"></a>
<FONT color="green">169</FONT>                            e.printStackTrace();<a name="line.169"></a>
<FONT color="green">170</FONT>                    }<a name="line.170"></a>
<FONT color="green">171</FONT>            }<a name="line.171"></a>
<FONT color="green">172</FONT>    <a name="line.172"></a>
<FONT color="green">173</FONT>            /**Initializes Location and  Distance Attenuation controls. It also starts the player<a name="line.173"></a>
<FONT color="green">174</FONT>             * It performs following steps:<a name="line.174"></a>
<FONT color="green">175</FONT>             * - Create player, loop it and play the content indefinitely<a name="line.175"></a>
<FONT color="green">176</FONT>             * - Create SoundSource 3D control and assign it to location control for Sound source<a name="line.176"></a>
<FONT color="green">177</FONT>             * - Create Spectator and assign it to spectator location control<a name="line.177"></a>
<FONT color="green">178</FONT>             * - Create distance attenuation control<a name="line.178"></a>
<FONT color="green">179</FONT>             * */<a name="line.179"></a>
<FONT color="green">180</FONT>            void initControls() {<a name="line.180"></a>
<FONT color="green">181</FONT>                    try {<a name="line.181"></a>
<FONT color="green">182</FONT>                            inStream = getClass().getResourceAsStream(AUDIO3D_SOUND);<a name="line.182"></a>
<FONT color="green">183</FONT>    <a name="line.183"></a>
<FONT color="green">184</FONT>                            // Create player<a name="line.184"></a>
<FONT color="green">185</FONT>                            player = Manager.createPlayer(inStream, CONTENT_TYPE);<a name="line.185"></a>
<FONT color="green">186</FONT>    <a name="line.186"></a>
<FONT color="green">187</FONT>                            // It will loop and play the content indefinitely<a name="line.187"></a>
<FONT color="green">188</FONT>                            player.setLoopCount(-1);<a name="line.188"></a>
<FONT color="green">189</FONT>                            player.realize();<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>                            // Create SoundSource 3D control and assign it to location control<a name="line.191"></a>
<FONT color="green">192</FONT>                            // for Sound source<a name="line.192"></a>
<FONT color="green">193</FONT>                            sound3D = GlobalManager.createSoundSource3D();<a name="line.193"></a>
<FONT color="green">194</FONT>                            sourceLC = (LocationControl) sound3D.getControl(LOCATION_CONTROL);<a name="line.194"></a>
<FONT color="green">195</FONT>                            sound3D.addPlayer(player);<a name="line.195"></a>
<FONT color="green">196</FONT>    <a name="line.196"></a>
<FONT color="green">197</FONT>                            // Create Spectator and assign it to spectator location control<a name="line.197"></a>
<FONT color="green">198</FONT>                            Spectator spectator = GlobalManager.getSpectator();<a name="line.198"></a>
<FONT color="green">199</FONT>                            specLC = (LocationControl) spectator.getControl(LOCATION_CONTROL);<a name="line.199"></a>
<FONT color="green">200</FONT>    <a name="line.200"></a>
<FONT color="green">201</FONT>                            // Create distance attenuation control<a name="line.201"></a>
<FONT color="green">202</FONT>                            ctlDistAtt = (DistanceAttenuationControl) sound3D<a name="line.202"></a>
<FONT color="green">203</FONT>                                            .getControl(DISTANCE_ATTENUATION_CONTROL);<a name="line.203"></a>
<FONT color="green">204</FONT>    <a name="line.204"></a>
<FONT color="green">205</FONT>                            player.prefetch();<a name="line.205"></a>
<FONT color="green">206</FONT>                            player.start();<a name="line.206"></a>
<FONT color="green">207</FONT>    <a name="line.207"></a>
<FONT color="green">208</FONT>                    } catch (Exception e) {<a name="line.208"></a>
<FONT color="green">209</FONT>                            e.printStackTrace();<a name="line.209"></a>
<FONT color="green">210</FONT>                    }<a name="line.210"></a>
<FONT color="green">211</FONT>            }<a name="line.211"></a>
<FONT color="green">212</FONT>    <a name="line.212"></a>
<FONT color="green">213</FONT>            /**<a name="line.213"></a>
<FONT color="green">214</FONT>             * Handles control commands&lt;br&gt;<a name="line.214"></a>
<FONT color="green">215</FONT>             * - locationCommand: Provide location settings form<a name="line.215"></a>
<FONT color="green">216</FONT>             * - distAttenuationCommand: Provide distance attenuation settings form<a name="line.216"></a>
<FONT color="green">217</FONT>             **/<a name="line.217"></a>
<FONT color="green">218</FONT>            public void commandAction(Command c, Displayable d) {<a name="line.218"></a>
<FONT color="green">219</FONT>                    // Handle commands for distance att.<a name="line.219"></a>
<FONT color="green">220</FONT>                    if (c == startCommand) {<a name="line.220"></a>
<FONT color="green">221</FONT>                            init();<a name="line.221"></a>
<FONT color="green">222</FONT>                    } else if (c == exitCommand) {<a name="line.222"></a>
<FONT color="green">223</FONT>                            destroyApp(true);<a name="line.223"></a>
<FONT color="green">224</FONT>                            notifyDestroyed();<a name="line.224"></a>
<FONT color="green">225</FONT>                    } else if (c == locationCommand) {<a name="line.225"></a>
<FONT color="green">226</FONT>                            if (locationForm == null) {<a name="line.226"></a>
<FONT color="green">227</FONT>                                    locationForm = new LocationForm("Location Settings", this);<a name="line.227"></a>
<FONT color="green">228</FONT>                            }<a name="line.228"></a>
<FONT color="green">229</FONT>                            display.setCurrent(locationForm);<a name="line.229"></a>
<FONT color="green">230</FONT>                    } else if (c == distAttenuationCommand){<a name="line.230"></a>
<FONT color="green">231</FONT>                if(distAttForm == null){<a name="line.231"></a>
<FONT color="green">232</FONT>                    distAttForm = new DistAttenuationForm("Distance " +<a name="line.232"></a>
<FONT color="green">233</FONT>                            "Attenuation Settings",this);<a name="line.233"></a>
<FONT color="green">234</FONT>                }<a name="line.234"></a>
<FONT color="green">235</FONT>                display.setCurrent(distAttForm);<a name="line.235"></a>
<FONT color="green">236</FONT>                    }<a name="line.236"></a>
<FONT color="green">237</FONT>    <a name="line.237"></a>
<FONT color="green">238</FONT>            }<a name="line.238"></a>
<FONT color="green">239</FONT>    <a name="line.239"></a>
<FONT color="green">240</FONT>    }<a name="line.240"></a>




























































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